cakephp2-php8/libs/time.php

<?PHP 
//////////////////////////////////////////////////////////////////////////
// + $Id$
// +------------------------------------------------------------------+ //
// + Cake <https://developers.nextco.com/cake/>                       + //
// + Copyright: (c) 2005, Cake Authors/Developers                     + //
// + Author(s): Michal Tatarynowicz aka Pies <tatarynowicz@gmail.com> + //
// +            Larry E. Masters aka PhpNut <nut@phpnut.com>          + //
// +            Kamil Dzielinski aka Brego <brego.dk@gmail.com>       + //
// +------------------------------------------------------------------+ //
// + Licensed under The MIT License                                   + //
// + Redistributions of files must retain the above copyright notice. + //
// + See: http://www.opensource.org/licenses/mit-license.php          + //
//////////////////////////////////////////////////////////////////////////

/**
  * Purpose: Time
  * Time related functions, formatting for dates etc.
  *
  * @filesource 
  * @author Cake Authors/Developers
  * @copyright Copyright (c) 2005, Cake Authors/Developers
  * @link https://developers.nextco.com/cake/wiki/Authors Authors/Developers
  * @package cake
  * @subpackage cake.libs
  * @since Cake v 0.2.9
  * @version $Revision$
  * @modifiedby $LastChangedBy$
  * @lastmodified $Date$
  * @license http://www.opensource.org/licenses/mit-license.php The MIT License
  */

uses ('object');

/**
  * Time related functions, formatting for dates etc.
  *
  * @package cake
  * @subpackage cake.libs
  * @since Cake v 0.2.9
  *
  */
class Time extends Object {

/**
  * Returns a formatted date string for given Datetime string.
  *
  * @param string $date_string Datetime string
  * @return string Formatted date string
  */
	function nice ($date_string=null) {
		$date = $date_string? strtotime($date_string): time();
		return date("D, M jS Y, H:i", $date);
	}

/**
  * Returns a formatted descriptive date string for given datetime string.
  * If the given date is today, the returned string could be "Today, 16:54".
  * If the given date was yesterday, the returned string could be "Yesterday, 16:54".
  * If $date_string's year is the current year, the returned string does not
  * include mention of the year.
  *
  * @param string $date_string Datetime string
  * @return string Described, relative date string
  */
	function niceShort ($date_string=null) {
		$date = $date_string? Time::fromString($date_string): time();

		$y = Time::isThisYear($date)? '': ' Y';

		if (Time::isToday($date)) 
			return "Today, ".date("H:i", $date);
		elseif (Time::wasYesterday($date))
			return "Yesterday, ".date("H:i", $date);
		else
			return date("M jS{$y}, H:i", $date);
	}

/**
  * Returns true if given datetime string is today.
  *
  * @param string $date Datetime string
  * @return boolean True if datetime string is today
  */
	function isToday ($date) {
		return date('Y-m-d', $date) == date('Y-m-d', time());
	}

/**
  * Returns true if given datetime string is within current year.
  *
  * @param string $date Datetime string
  * @return boolean True if datetime string is within current year
  */
	function isThisYear ($date) {
		return date('Y', $date) == date('Y', time());
	}

/**
  * Returns true if given datetime string was yesterday.
  *
  * @param string $date Datetime string
  * @return boolean True if datetime string was yesterday
  */
	function wasYesterday ($date) {
		return date('Y-m-d', $date) == date('Y-m-d', strtotime('yesterday'));
	}

/**
  * Returns a Unix timestamp from a textual datetime description. Wrapper for PHP function strtotime().
  *
  * @param string $date_string Datetime string to be represented as a Unix timestamp
  * @return int Unix timestamp
  */
	function fromString ($date_string) {
		return strtotime($date_string);
	}

/**
  * Returns a date formatted for Atom RSS feeds.
  *
  * @param string $date Datetime string
  * @return string Formatted date string
  */
	function toAtom ($date) {
		return date('Y-m-d\TH:i:s\Z', $date);
	}

/**
  * Formats date for RSS feeds
  *
  * @param datetime $date Datetime string
  * @return string Formatted date string
  */
	function toRSS ($date) {
		return date('D, d M Y H:i:s O', $date);
	}

/**     
 * Returns either a relative date or a formatted date depending
 * on the difference between the current time and given datetime.
 * $datetime should be in a <i>strtotime</i>-parsable format like MySQL datetime.
 *      
 *      Relative dates look something like this:
 *          3 weeks, 4 days ago
 *          15 seconds ago
 *      Formatted dates look like this:
 *          on 02/18/2004
 *      
 * The returned string includes 'ago' or 'on' and assumes you'll properly add a word
 *      like 'Posted ' before the function output.
 *      
 * @param $datetime	Time in strtotime-parsable format
 * @return string Relative time string.
 */

	function timeAgoInWords ($datetime)
	{
		$in_seconds=strtotime($datetime);
		$diff = time()-$in_seconds;
		$months = floor($diff/2419200);
		$diff -= $months*2419200;
		$weeks = floor($diff/604800);
		$diff -= $weeks*604800;
		$days = floor($diff/86400);
		$diff -= $days*86400;
		$hours = floor($diff/3600);
		$diff -= $hours*3600;
		$minutes = floor($diff/60);
		$diff -= $minutes*60;
		$seconds = $diff;
	
		if ($months>0) {
			// over a month old, just show date (mm/dd/yyyy format)
			return 'on '.date("j/n/Y", $in_seconds);
		} else {
			$relative_date='';
			if ($weeks>0) {
				// weeks and days
				$relative_date .= ($relative_date?', ':'').$weeks.' week'.($weeks>1?'s':'');
				$relative_date .= $days>0?($relative_date?', ':'').$days.' day'.($days>1?'s':''):'';
			} elseif ($days>0) {
				// days and hours
				$relative_date .= ($relative_date?', ':'').$days.' day'.($days>1?'s':'');
				$relative_date .= $hours>0?($relative_date?', ':'').$hours.' hour'.($hours>1?'s':''):'';
			} elseif ($hours>0) {
				// hours and minutes
				$relative_date .= ($relative_date?', ':'').$hours.' hour'.($hours>1?'s':'');
				$relative_date .= $minutes>0?($relative_date?', ':'').$minutes.' minute'.($minutes>1?'s':''):'';
			} elseif ($minutes>0) {
				// minutes only
				$relative_date .= ($relative_date?', ':'').$minutes.' minute'.($minutes>1?'s':'');
			} else {
				// seconds only
				$relative_date .= ($relative_date?', ':'').$seconds.' second'.($seconds>1?'s':'');
			}
		}
		// show relative date and add proper verbiage
		return $relative_date.' ago';
	}
	
}

?>